CN1884170A - Method for sintering and soft burning magnesia in tunnel kiln by using magnesite powder and particles - Google Patents
Method for sintering and soft burning magnesia in tunnel kiln by using magnesite powder and particles Download PDFInfo
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- CN1884170A CN1884170A CNA2006100470619A CN200610047061A CN1884170A CN 1884170 A CN1884170 A CN 1884170A CN A2006100470619 A CNA2006100470619 A CN A2006100470619A CN 200610047061 A CN200610047061 A CN 200610047061A CN 1884170 A CN1884170 A CN 1884170A
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- giobertite
- calcined magnesia
- raw material
- magnesite
- light calcined
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2/00—Lime, magnesia or dolomite
- C04B2/10—Preheating, burning calcining or cooling
- C04B2/104—Ingredients added before or during the burning process
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2/00—Lime, magnesia or dolomite
- C04B2/10—Preheating, burning calcining or cooling
- C04B2/102—Preheating, burning calcining or cooling of magnesia, e.g. dead burning
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention discloses a magnesia light-sintering method in the tunnel kiln, which comprises the following steps: selecting 30-50 percent 1-50 mm magnesite ore and 50-70 percent magnesite powder with less than 1 mm grain size as raw material; adding light-magnesite powder or pulp wastewater as coagulant; stirring; moulding through pressure; drying; moulding; sintering in the tunnel kiln; selecting 50-200 mm grain size magnesite as raw material; putting the raw material in the container rack of flameproof material; placing on the stillage truck in the tunnel kiln to obtain light-burning magnesia through high-temperature sintering.
Description
Technical field
The invention belongs to the ore processing technique field, relate to a kind of method of utilizing mineral powder of magnesite, grain sintering light calcined magnesia in tunnel furnace.
Background technology
The light calcined magnesia product is very extensive in field purposes such as chemical industry, agricultural, light industry, environmental protection metallurgy, buildings, produces the basic raw material of refractory materials especially.Giobertite is a main raw material of producing light calcined magnesia.The explored wagnerite reserves in the whole world are about 12,600,000,000 tons at present, and the explored wagnerite reserves of China are more than 30 hundred million tons, account for 24% of world's total amount.The domestic method that is beneficial to high-boiling klining knot production light calcined magnesia, at first need ore reduction and wear into 200 purpose fine powders, carry out sintering again, have that investment is big, auxiliary facility is many, complex process, energy consumption height, yield poorly, this method is domestic to be showed to be eliminated substantially.The method of producing the light calcined magnesia employing at present is with giobertite sintering in light-burned reflecting kiln, producing the used raw material of light calcined magnesia in this way must be the piece material of granularity greater than 200mm, and this sintering processing exists that the energy consumption high pollution is big, operating environment is abominable, working strength of workers is high, the problems such as difficult quality control of product.Produce 30% mineral powder of magnesite, grain in addition in mining, this part ore goes out of use basically or is used to and paves the way, even causes the wasting of resources and environmental pollution.
Summary of the invention
The present invention has overcome the defective of above-mentioned existence, and it is the mineral powder of magnesite of 0.01～50mm, the method for grain sintering light calcined magnesia in tunnel furnace with granularity that purpose provides a kind of.
The present invention utilizes the method content Description of mineral powder of magnesite, grain sintering light calcined magnesia in tunnel furnace:
The present invention utilizes the method for mineral powder of magnesite, grain sintering light calcined magnesia in tunnel furnace, it is characterized in that: producing light calcined magnesia has three kinds of methods:
(1), produce high-grade light calcined magnesia, select the high purity giobertite for use by the weight ratio of giobertite, the content of MgO＞46.5% in the giobertite, granularity is that giobertite 30～50%, the granularity＜1mm mineral powder of magnesite 50～70% of 1～50mm is raw material; Add giobertite raw material weight 3～50% again, the light-magnesite powder of granularity＜0.1mm, through stirring, pressure forming, carried out drying, 30～90 minutes time of drying or seasoning 24 hours 200～300 ℃ of temperature, behind the dryness finalization, pile up and on chassis, send into high-temperature calcination in the tunnel furnace, the kiln temperature is heated to 850～1100 ℃ gradually by 200 ℃, be incubated 30～60 minutes, be cooled to 200～300 ℃ after kiln discharge, obtain high-grade light calcined magnesia;
(2), produce low-grade light calcined magnesia, select the low-purity giobertite for use by the weight ratio of giobertite, the content of MgO＜46.5% in the giobertite, granularity are that giobertite 30～50%, the granularity＜1mm mineral powder of magnesite 50～70% of 1～50mm is raw material; The spent pulping liquor that adds giobertite raw material weight 3～10% again is peptizer, through stirring, pressure forming, carried out drying, 30～90 minutes time of drying or seasoning 24 hours 200～300 ℃ of temperature, behind the dryness finalization, pile up and send into high-temperature calcination in the tunnel furnace on chassis, the kiln temperature is heated to 850～1100 ℃ gradually by 200 ℃, is incubated 30～60 minutes, kiln discharge after being cooled to 200～300 ℃ obtains low-grade light calcined magnesia;
(3), selecting granularity for use is that the giobertite of 50～200mm is a raw material, put it in the charge frame made from refractory materials, pile up on chassis, send into high-temperature calcination in the tunnel furnace, the kiln temperature is heated to 850～1100 ℃ gradually by 200 ℃, be incubated 30～60 minutes, be cooled to 200～300 ℃ after kiln discharge, obtain light calcined magnesia.
The present invention utilizes the method for mineral powder of magnesite, grain sintering light calcined magnesia in tunnel furnace, utilize the mineral powder of magnesite, the grain that produce in the mining and go out of use to be raw material, the SINTERING PRODUCTION light calcined magnesia is turned waste into wealth, for country has saved a large amount of precious resources.Produce the light calcined magnesia product with the present invention, technical indicator that can the regulated at will product, as activity, burning vector etc., can reduce consumption, reduce environmental pollution, improve workman's operating environment widely, reduced labour intensity, method than other tunnel kiln sintering light calcined magnesia reduces fuel consumption more than 60%, and the recyclable utilization of carbonic acid gas that produces in the kiln is given plant absorbing in the booth of agricultural cultivation industry.
Embodiment
It is to realize like this that the present invention utilizes mineral powder of magnesite, grain method of sintering light calcined magnesia in tunnel furnace.
Embodiment 1
With giobertite is raw material, produce high-grade light calcined magnesia, select the high purity giobertite for use by the weight ratio of giobertite, the content of MgO＞46.5% in the giobertite, granularity is that giobertite 30～50%, the granularity＜1mm mineral powder of magnesite 50～70% of 1～50mm is raw material; Add giobertite raw material weight 3～50% again, the light-magnesite powder of granularity＜0.1mm, through stirring, pressure forming, carried out drying, 30～90 minutes time of drying or seasoning 24 hours 200～300 ℃ of temperature, behind the dryness finalization, pile up and on chassis, send into high-temperature calcination in the tunnel furnace, the kiln temperature is heated to 850～1100 ℃ gradually by 200 ℃, be incubated 30～60 minutes, be cooled to 200～300 ℃ after kiln discharge, obtain content of magnesia and be the light calcined magnesia of 90～98% top grade.
Embodiment 2
With giobertite is raw material, produce low-grade light calcined magnesia, select the low-purity giobertite for use by the weight ratio of giobertite, the content of MgO＜46.5% in the giobertite, granularity is that giobertite 30～50%, the granularity＜1mm mineral powder of magnesite 50～70% of 1～50mm is raw material; The spent pulping liquor that adds giobertite raw material weight 3～10% again is peptizer, through stirring, pressure forming, carried out drying, 30～90 minutes time of drying or seasoning 24 hours 200～300 ℃ of temperature, behind the dryness finalization, pile up and send into high-temperature calcination in the tunnel furnace on chassis, the kiln temperature is heated to 850～1100 ℃ gradually by 200 ℃, is incubated 30～60 minutes, kiln discharge after being cooled to 200～300 ℃ obtains content of magnesia and is the light calcined magnesia of 85～96% low grade.
Embodiment 3
Selecting granularity for use is that the giobertite of 50～200mm is a raw material, put it in the charge frame made from refractory materials, pile up on chassis, send into high-temperature calcination in the tunnel furnace, the kiln temperature is heated to 850～1100 ℃ gradually by 200 ℃, be incubated 30～60 minutes, be cooled to 200～300 ℃ after kiln discharge, obtain light calcined magnesia.
It is to realize through the experiment in 2 years demonstration repeatedly that the present invention utilizes mineral powder of magnesite, grain method of sintering light calcined magnesia in tunnel furnace.
Experimental data
This experimental data is after reaching experimental temperature, is incubated 30 minutes, be cooled to 200～300 ℃ after kiln discharge, the data that obtain.
| Sequence number | Experimental temperature (℃) | Burn vector | Content of magnesia (MgO) |
| 1 | 850 | 7～8 | 90～91 |
| 2 | 900 | 3～3.5 | 94～95 |
| 3 | 960 | 1.4～1.6 | 95～96.5 |
| 4 | 1000 | 0.9～1.1 | 96.5～97 |
| 5 | 1035 | 0.5～0.6 | 97～97.5 |
| 6 | 1050 | 0.4～0.5 | 97～97.7 |
| 7 | 1100 | 0.25～0.35 | 97.5～98 |
The present invention has drawn working method and technical data accurately, successfully having solved other utilizes the living light calcined magnesia of tunnel furnace can not rationally utilize the tunnel kiln space, cause yield poorly, the cost height, problem such as waste energy, the present invention utilizes the method for mineral powder of magnesite, grain sintering light calcined magnesia in tunnel furnace, it is more than 2 times of other method that kiln is imitated (ratio of unit kiln space and output), fuel consumption reduces more than 60%, has saved a large amount of energy.
Claims (1)
1, a kind of method of utilizing mineral powder of magnesite, grain sintering light calcined magnesia in tunnel furnace, it is characterized in that: producing light calcined magnesia has three kinds of methods:
(1), produce high-grade light calcined magnesia, select the high purity giobertite for use by the weight ratio of giobertite, the content of MgO＞46.5% in the giobertite, granularity is that giobertite 30～50%, the granularity＜1mm mineral powder of magnesite 50～70% of 1～50mm is raw material; Add giobertite raw material weight 3～50% again, the light-magnesite powder of granularity＜0.1mm, through stirring, pressure forming, carried out drying, 30～90 minutes time of drying or seasoning 24 hours 200～300 ℃ of temperature, behind the dryness finalization, pile up and on chassis, send into high-temperature calcination in the tunnel furnace, the kiln temperature is heated to 850～1100 ℃ gradually by 200 ℃, be incubated 30～60 minutes, be cooled to 200～300 ℃ after kiln discharge, obtain high-grade light calcined magnesia;
(2), produce low-grade light calcined magnesia, select the low-purity giobertite for use by the weight ratio of giobertite, the content of MgO＜46.5% in the giobertite, granularity are that giobertite 30～50%, the granularity＜1mm mineral powder of magnesite 50～70% of 1～50mm is raw material; The spent pulping liquor that adds giobertite raw material weight 3～10% again is peptizer, through stirring, pressure forming, carried out drying, 30～90 minutes time of drying or seasoning 24 hours 200～300 ℃ of temperature, behind the dryness finalization, pile up and send into high-temperature calcination in the tunnel furnace on chassis, the kiln temperature is heated to 850～1100 ℃ gradually by 200 ℃, is incubated 30～60 minutes, kiln discharge after being cooled to 200～300 ℃ obtains low-grade light calcined magnesia;
(3), selecting granularity for use is that the giobertite of 50～200mm is a raw material, put it in the charge frame made from refractory materials, pile up on chassis, send into high-temperature calcination in the tunnel furnace, the kiln temperature is heated to 850～1100 ℃ gradually by 200 ℃, be incubated 30～60 minutes, be cooled to 200～300 ℃ after kiln discharge, obtain light calcined magnesia.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100470619A CN100413802C (en) | 2006-06-28 | 2006-06-28 | Method for sintering and soft burning magnesia in tunnel kiln by using magnesite powder and particles |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006100470619A CN100413802C (en) | 2006-06-28 | 2006-06-28 | Method for sintering and soft burning magnesia in tunnel kiln by using magnesite powder and particles |
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| Publication Number | Publication Date |
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| CN1884170A true CN1884170A (en) | 2006-12-27 |
| CN100413802C CN100413802C (en) | 2008-08-27 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101565280B (en) * | 2009-06-16 | 2011-08-10 | 海城华宇耐火材料有限公司 | Manufacturing method for burning light burning magnesite powder by tunnel kiln |
| CN102774861A (en) * | 2012-08-17 | 2012-11-14 | 海城三星矿业有限公司 | Purification process of high-purity magnesia |
| CN103435277A (en) * | 2013-08-23 | 2013-12-11 | 北京科太亚洲生态科技有限公司 | Internal gas burning shaft kiln and method for producing light burned magnesia |
| CN106145716A (en) * | 2015-03-25 | 2016-11-23 | 北京矿冶研究总院 | Method for preparing light-burned magnesium oxide by using magnesite powdery tailings |
| CN106186737A (en) * | 2016-07-12 | 2016-12-07 | 海城市恒镁科技有限公司 | A kind of method of the eco-friendly light-burned good quality magnesium oxide of magnesite concentrate |
| CN107010852A (en) * | 2017-04-20 | 2017-08-04 | 辽宁科技大学 | A kind of light calcined magnesia production method |
| CN107663096A (en) * | 2017-09-16 | 2018-02-06 | 常州富思通管道有限公司 | A kind of preparation method of anti-thermal shock type silica brick |
| WO2020155243A1 (en) * | 2019-02-01 | 2020-08-06 | 东北大学 | Method for preparing high-density magnesia from magnesite by means of spark plasma sintering |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100334025C (en) * | 2005-08-03 | 2007-08-29 | 东北大学 | Method for producing soft firing magnesium oxide using tunnel kiln to calcine magnesite |
-
2006
- 2006-06-28 CN CNB2006100470619A patent/CN100413802C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101565280B (en) * | 2009-06-16 | 2011-08-10 | 海城华宇耐火材料有限公司 | Manufacturing method for burning light burning magnesite powder by tunnel kiln |
| CN102774861A (en) * | 2012-08-17 | 2012-11-14 | 海城三星矿业有限公司 | Purification process of high-purity magnesia |
| CN103435277A (en) * | 2013-08-23 | 2013-12-11 | 北京科太亚洲生态科技有限公司 | Internal gas burning shaft kiln and method for producing light burned magnesia |
| CN103435277B (en) * | 2013-08-23 | 2015-10-21 | 北京科太亚洲生态科技有限公司 | A kind of internal combustion gas-burned vertical limekiln for the production of light calcined magnesia and method |
| CN106145716A (en) * | 2015-03-25 | 2016-11-23 | 北京矿冶研究总院 | Method for preparing light-burned magnesium oxide by using magnesite powdery tailings |
| CN106145716B (en) * | 2015-03-25 | 2019-01-22 | 北京矿冶研究总院 | Method for preparing light-burned magnesium oxide by using magnesite powdery tailings |
| CN106186737A (en) * | 2016-07-12 | 2016-12-07 | 海城市恒镁科技有限公司 | A kind of method of the eco-friendly light-burned good quality magnesium oxide of magnesite concentrate |
| CN106186737B (en) * | 2016-07-12 | 2018-11-06 | 海城市恒镁科技有限公司 | A kind of method of the environmental-friendly light-burned good quality magnesium oxide of magnesite concentrate |
| CN107010852A (en) * | 2017-04-20 | 2017-08-04 | 辽宁科技大学 | A kind of light calcined magnesia production method |
| CN107010852B (en) * | 2017-04-20 | 2019-04-05 | 辽宁科技大学 | A kind of light calcined magnesia production method |
| CN107663096A (en) * | 2017-09-16 | 2018-02-06 | 常州富思通管道有限公司 | A kind of preparation method of anti-thermal shock type silica brick |
| WO2020155243A1 (en) * | 2019-02-01 | 2020-08-06 | 东北大学 | Method for preparing high-density magnesia from magnesite by means of spark plasma sintering |
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| CN100413802C (en) | 2008-08-27 |
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